When importing RAW files I've noticed that Lightroom first previews the image with the in-camera processing applied but as the image fully loads a default look is applied. So for instance with a Sony camera the look set in the camera's Creative Look setting (std, vivid, ntrl, clear, deep, portrait, b/w, sepia) carry's across with the RAW file only for Lightroom to quickly glimpse it and then apply it's own default look.
What is this? and is there a way for Lightroom to preserve the in-camera look?
The first look you see is from the JPEG that is embedded in the raw file by the camera. It isn't anything that LR pulls from the raw data.
Take a look at the Profile dropdown in the Camera Calibration section of the Develop Module. For most cameras, those profiles attempt to match the "looks" that the camera provides.
The image you see briefly at first is the raw file's embedded jpg preview, then the raw file itself loads.
Lightroom doesn't see the camera settings - it just loads the raw file, you would probably see these settings if you used Sony's own raw converter.
But you can check to see if there are any camera profiles that suit you in the Camera calibration panel in Develop.